I am against for several reasons :
1 - When we start a new account we have 100 tokens and with that we can buy a premium box, with the trade system it would possible to have premium items and therefore generate unlimited premium item .
2 - It would be break the game, people will be able whatever they want, personnaly i have 3 premium items that i do not use, with that i would have already practically finished building my first mech in just 4 months of play ( i am free to play )
3 - Not all items are balanced and it may still be in several years, for example, i trade a purifier for a vest it was like trade a old phone that can only call for the newer and more advanced .
Its not for disrespect you but the trade functions is not a good idea .